Moetimbe duperow



(No Model) M. DUPEROW.

TELEGRAPHIG SERVICE SYSTEM. No. 332,193. Patented Dec. 8, 1885.

WITNESSES INVBNTOR ATTORNEY UNITED STATES PATENT FFIcE.

MORTIMER DUPEROWV, OF \VASHI NGTON, DISTRIOT'OF COLUMBIA.

TELEGRAPHlC-SERVICE SYSTEM.

SPECIFICATION forming part of Letters Patent No. 332,193, dated December 8, 1885.

Application filed November 12, 1884. Renewed November 11, 1885. Serial No. 182,476. (No model.)

To all whom it may concern:

Be it known that I, MORTIMER DUPEROW, a citizen of the Dominion of Canada, residing at Washington, District of Columbia, have invented certain new and useful Improvements in Telegraphic-Service Systems, of which the following is a specification, reference being had to the accompanying drawing.

Prior to my present invention the sharp competition among rival telegraph companies, especially in the large cities, has compelled them oftentimes, in order to build up or preserve reputations for enterprise and accommodation to the general public, to maintain offices for the transmission of messages at stations where the receipts do not exceed, and sometimes do not equal, the expenditures for rent and service. The stations could be made a fruitful source of revenue in many cases if the expense of maintaining a skilled operator at them could be dispensed with, and all the appearances of an office maintained in a manner that Would serve the purpose of advertising the company and bring it prominently before a class of people who are only aware of the existence of the long-established companice. It would, moreover, then become practicable to extend the system into districts economically inaccessible under the present status of things, multiplying the number of stations with a corresponding benefit to the public.

Hotels, railway-stations, large retail stores, banks, public buildings, and the like, where the general course of business daily attracts large numbers of people, and which are readily accessible to all, are especially adapted for the location of transmitting-stations maintainable at a low cost, and conferring a mutual benefit upon the company and the public. With a view to realizing these advantages, my invention contemplates establishing at each of said points a telegraphic sounder included within a normally-closed circuit containing all of the other sounders, said circuit being adapted to be automatically and continuously broken and closed by a circuitbreaker or its equivalent operated by a suitable motor. The makes and breaks produced by the circuit-breaker are, to heighten the effect, preferably in imitation of the Morse alphabet and the continuous and well-kn0wn clicking of the sounders in the various places of resort serves to call the attention of those present to the fact that there are at hand telegraphic facilities. At each sounder I propose to locate a call-box included in a circuit extending to a main or branch office, where it operates asuitableannunciator inthe ordinary manner. If desired, and preferably, I also place in prominent position near the sounder and call box a tablet of message-blanks, whereby the persons telegraphing may prcpare their messages during the brief interval ensuing between the time of using the call-box and the arrival of the messenger.

I have illustated my invention in the accompanying drawing, which represents the same diagrammatically.

A. indicates a main office, established as centrally as may be within the district to be served. At this office, or, if preferred, at any other point in the respective lines, are located the service-batteries E and F of a soundercircuit and a call-bell circuit.

The various stations, stores, hotels, railwaydepots, public buildings, and the like, marked Stations 1, 2, 3, 4, &c., and inclosed by arbitrary lines, are each supplied with a sounder and a call-box located close to one another and included, respectively, in the circuits as and y.

K represents a main office annunciator included in the call-box circuit, and H a galvanometer in the sounder-circuit. The latter, by means of resistance-coils, can be utilized to maintain a given strength of current, and thereby prevent the sounders being thrown out of adjustment. In the sounder-circuit is also located a circuit-breaker consisting of a platinum spring, D, attached to a brass plate, M, bearing binding-screw W, the end of said spring pressing against the irregularly-spaced cogs O of a revolving wheel, 0. The latter is mounted upon a shaft, L, connected with the battery E by a part of the main-circuit wire, and is revolved continuously, by means of any suitable motor, in the direction indicated by the arrow. The cogs of the wheelare preferably of such breadth and so spaced as to correspond with the dots and dashes of the Morse alphabet, but may, if desired, be otherwise arranged.

The parts being constructed and arranged operate continuously and uniformly, producing at the various stations the familiar'clicking of the telegraphic instrument. This contablet and call-box. By means of the latter tending to an annunciator located at a main office, substantially as shown and described. In testimony whereof I affix my signature in-presence of two witnesses. tinuous clicking is sufficient to .direct the attention of a person desiring to send a message to the spot where the sounder is situated, and, proceeding thither, he finds at hand a message- MORTIMER DUPEROW.

Witnesses:

JOHN G. PENNIE, J. R. NOTTINGHAM. 

